jellyfin-web/src/controllers/edititemmetadata.js

define(["loading", "scripts/editorsidebar"], function (loading) {
    "use strict";

    function reload(context, itemId) {
        loading.show();

        if (itemId) {
            require(["metadataEditor"], function (metadataEditor) {
                metadataEditor.embed(context.querySelector(".editPageInnerContent"), itemId, ApiClient.serverInfo().Id);
            });
        } else {
            context.querySelector(".editPageInnerContent").innerHTML = "";
            loading.hide();
        }
    }

    return function (view, params) {
        view.addEventListener("viewshow", function () {
            reload(this, MetadataEditor.getCurrentItemId());
        });
        MetadataEditor.setCurrentItemId(null);
        view.querySelector(".libraryTree").addEventListener("itemclicked", function (event) {
            var data = event.detail;

            if (data.id != MetadataEditor.getCurrentItemId()) {
                MetadataEditor.setCurrentItemId(data.id);
                reload(view, data.id);
            }
        });
    };
});